- Students will understand the definition of function and use it to identify whether or not an input-output pairing represents a function.
- Students will determine if a graph represents a function by using a moving vertical line.
- Students will determine if a table of x- and y-values represents a function.
- Students will use clear definitions in discussion and reasoning (CCSS Mathematical Practice).
About the Lesson
In this lesson, students are presented with graphs and tables and asked to determine which represent functions and which do not. A function associates exactly one output value y with each possible input value x. If more than one output value y is associated with a single input value x, that process does not describe a function.